We know that the radius of the garden is r = 1.5 ft. use the formula for circumference to find the total length of fencing and round to the nearest tenth:
C = 2(pi symbol)r = 2(pi symbol)(1.5) = 9.4
Since the edging costs $0.75 per foot, find the total cost by multiplying the length of fencing by the cost per foot:
9.4($0.75) = $7